Door security brace



FIG. 1 is a top, front, and right side perspective view of a door security brace showing my new design, the broken-line disclosure of a fragment of a door and frame being for illustrative purposes only and forming no part of the claimed design;

FIG. 2 is an enlarged front elevational view thereof;

FIG. 3 is an enlarged top plan view thereof;

FIG. 4 is an enlarged bottom plan view thereof;

FIG. 5 is an enlarged left side elevational view thereof; and,

FIG. 6 is an enlarged right side elevational view thereof. 

The ornamental design for a door security brace, as shown and described. 